<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<style type="text/css">
			div{
				color: red;
			}
			#box1 #box2{
				color: green;
			}
		</style>
	</head>
	<body>
		<div id="box1" class="div1">
			<div id="box2" class="div2">
				<div id="box" class="div3">
					<p>清水出芙蓉，蠢猪各不同</p>
				</div>
			</div>
		</div>
	</body>
</html>
